Firman T04073 — Spark Plug Maintenance
Maintenance
For the Firman T04073, from the Firman owner's manual.
Applies to: Firman T04073
Parts for this job
- 330723001 Spark plug eBay $9.99
Part numbers from the service-parts list for Firman T04073. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Remove spark plug boot
- Remove spark plug using provided wrench
- Inspect spark plug for damage and clean with wire brush before reinstalling, replace if damaged
- Adjust electrode gap to 0.020-0.024 in. (0.5-0.6mm)
- Seat spark plug in position and thread by hand to prevent cross threading
- Tighten plug with provided wrench and put spark plug boot back on
Tools required
- spark plug wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- {'item': 'electrode gap', 'value': '0.020-0 FridayParts $214.68.024 in. (0.5-0.6mm)'}
Full service-parts list: Firman T04073 →
Source: Firman owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.